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CD14 protein as a modulator of the inflammatory response

Anna Ciesielska1, Ichrak Ben Amor1, Katarzyna Kwiatkowska1

  • 1Pracownia Biologii Molekularnej Błony Komórkowej, Instytut Biologii Doświadczalnej im. M. Nenckiego PAN, Warszawa.

Postepy Biochemii
|July 16, 2024
PubMed

Insights

Cluster of Differentiation 14 (CD14) protein is crucial for immune cell inflammatory responses by binding lipopolysaccharide (LPS) and activating Toll-like receptor 4 (TLR4) signaling. Its role extends to non-infectious diseases like autoimmune and cardiovascular conditions.

Area of Science:

  • Immunology
  • Molecular Biology
  • Biochemistry

Background:

  • Cluster of Differentiation 14 (CD14) is a key protein in the immune system's inflammatory response.
  • CD14 facilitates the recognition of bacterial lipopolysaccharide (LPS) by immune cells.
  • It plays a critical role in initiating signaling cascades essential for combating infections.

Purpose of the Study:

  • To elucidate the multifaceted roles of CD14 in immune response activation.
  • To highlight CD14's function as both a transporter and regulator of Toll-like receptor 4 (TLR4) activity.
  • To explore the emerging significance of CD14 in non-infectious disease pathogenesis.

Main Methods:

  • The study focuses on the molecular interactions of CD14 with LPS and the TLR4-MD-2 complex.
  • Mechanisms of CD14-mediated endotoxin transport and receptor regulation were investigated.
  • Literature review and analysis of current research on CD14's involvement in various disease states.

Main Results:

  • CD14 binds LPS and transfers it to the TLR4-MD-2 complex, initiating pro-inflammatory signaling.
  • CD14 acts as a crucial transporter and regulator for LPS and other microbial/endogenous molecules.
  • CD14's involvement is increasingly recognized in non-infectious diseases, including autoimmune, metabolic, and cardiovascular conditions.

Conclusions:

  • CD14 is a central mediator of inflammatory responses to pathogens.
  • Its regulatory functions extend beyond infection, impacting chronic non-infectious diseases.
  • Further research into CD14's role is vital for understanding and treating a spectrum of inflammatory and non-infectious disorders.

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